Question 618667
If the mean of seven numbers is 96 and an eighth number is added which makes the mean becomes 112. What will  that eighth number be?
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The 1st seven numbers have a sum = 7*96 = 672 points
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Let the eighth number be "x":
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Equation:
(672+x)/8 = 112
672+x = 8*112
x = 8*112 -672
x = 224
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Cheers,
Stan H.